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Dissertations / Theses on the topic 'Abrasion'

Author: Grafiati
Published: 4 June 2021
Last updated: 25 July 2025

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1

Popa, Mihaela. "Tooth cleaning : abrasive particles but no abrasion." Thesis, Lyon, 2017. http://www.theses.fr/2017LYSEI034.

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En 1997 Stuard L. Fischman a dit « Certainement on mange bien, on parle bien, on a l'air bien et on « sent frais » - mais on a aussi la plaque dentaire, la gingivite et les caries dentaires. Le lecteur peut déterminer les progrès réalisés en réfléchissant à son état de santé bucco-dentaire personnel! ». Vingt ans plus tard cette affirmation reste valide. L'acte le plus commun d'hygiène buccale est de se nettoyer les dents par brosse à dents, eau et dentifrice. Le rôle principal de la brosse à dents et du dentifrice est d'éliminer le biofilm dentaire responsable des maladies buccales. Il est la
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2

Ribeiro, Vilmondes. "Abrasividade pendular e a resistência mecânica das rochas." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/3/3134/tde-20082010-164048/.

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A interação entre rocha e metal, na forma de operações como perfuração, escavação e cominuição, dá origem a dois efeitos: um desejado, desagregação da rocha e outro indesejado, desgaste do metal. Como o desgaste, dramaticamente, influencia o desempenho dos equipamentos, é fundamental para estabelecer uma base para equações de predição de taxas de desgaste potencial. Neste contexto, Golovanevskiy e Bearman (2008), propuseram mais um método para avaliação da abrasividade. Este método, ensaio de abrasão por impacto deslizante (Gouging Abrasion Test), é realizado em condições de alta tensão/alto i
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3

Kelly, Damian Anthony. "Abrasion in oral care." Thesis, University of Cambridge, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.619939.

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4

Sadegzadeh, Massud. "Abrasion resistance of concrete." Thesis, Aston University, 1985. http://publications.aston.ac.uk/14253/.

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This thesis describes an experimental study of the abrasion resistance of concrete at both the macro and micro levels. This is preceded by a review related to friction and wear, methods of test for assessing abrasion resistance, and factors influencing the abrasion resistance of concrete. A versatile test apparatus was developed to assess the abrasion resistance of concrete. This could be operated in three modes and a standardised procedure was established for all tests. A laboratory programme was undertaken to investigate the influence, on abrasion resistance, of three major factors - finishi
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5

Cozza, Ronaldo Câmara. "Estudo do comportamento do coeficiente de desgaste e dos modos de desgaste abrasivo em ensaios de desgaste micro-abrasivo." Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/3/3151/tde-31032008-101929/.

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Esta Dissertação tem por objetivo estudar o comportamento de diferentes materiais sob a ação de desgaste micro-abrasivo. Como parte do trabalho, foi projetada e construída uma máquina de ensaio desgaste por micro-abrasão por esfera rotativa fixa, com configuração mecânica com diferenças em relação às observadas na literatura (Gee et al., 2005). Como corpos-de-prova, foram utilizadas pastilhas intercambiáveis de metal duro (classe P20) e aço ferramenta M2. As esferas foram de aço AISI 1010 cementado e aço AISI 52100 temperado e revenido. Durante os ensaios, foi inserida entre a esfera e o corpo
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6

Doan, Yen The. "Experimental investigation and wear simulation of three-body abrasion." Doctoral thesis, Technische Universitaet Bergakademie Freiberg Universitaetsbibliothek "Georgius Agricola", 2015. http://nbn-resolving.de/urn:nbn:de:bsz:105-qucosa-158239.

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The wear process in three-body contact causes problems of abrasion such as volume loss and changes of geometry of the triboelements. The wear problem leads to increased failure and high costs for repairing or replacing equipment. To understand the nature of the wear behaviour and to predict the wear rate in advance, experimental investigation and numerical simulation of the wear process are required. In this work, the wear process is analysed and the influencing parameters governing the wear behaviour are investigated experimentally to develop a new wear model. Main influential factors are con
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7

Wu, Guangchang. "The mechanisms of rubber abrasion." Thesis, Queen Mary, University of London, 2017. http://qmro.qmul.ac.uk/xmlui/handle/123456789/25986.

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Rubber abrasion is one of the most important properties for rubber products, such as tyres. However, due to its complexity rubber abrasion is still a very challenging topic in rubber research. Rubber abrasion is not governed by a single mechanism. Different mechanisms can dominate the abrasion behaviour depending on the rubber compound, base polymer type, loading severity, contact conditions, testing temperature and chemical environment. This study investigates the different mechanisms for rubber abrasion and the transition between these mechanisms using two types of abrasion apparatus, a blad
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8

Cozza, Ronaldo Câmara. "Estudo do desgaste e atrito em ensaios micro-abrasivos por esfera rotativa fixa em condições de força normal constante e pressão constante." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/3/3151/tde-26082011-143752/.

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O ensaio de desgaste micro-abrasivo por esfera rotativa vem conquistando elevada aceitação em universidades e centros de pesquisa, sendo amplamente adotado em estudos envolvendo desgaste abrasivo de materiais. Dois modos de desgaste abrasivo podem ser observados neste tipo de ensaio: rolamento resulta quando as partículas abrasivas rolam sobre a superfície do corpo-de-prova, enquanto riscamento é observado quando as partículas abrasivas deslizam sobre o mesmo; o tipo do modo de desgaste abrasivo apresenta uma significante influência sobre o comportamento de um sistema tribológico. Diversos tra
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9

Evans, Paul Done. "The hardness and abrasion of polymers." Thesis, Imperial College London, 1987. http://hdl.handle.net/10044/1/38305.

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10

Liang, Hancheng. "Investigating the mechanism of elastomer abrasion." Thesis, Queen Mary, University of London, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.582606.

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This study aims to understand the mechanism of elastomer abrasion using Finite Element Analysis (FEA) techniques. A blade abrasion device is used to create the abrasion patterns. The initiation of the abrasion patterns is investigated by observing how the cracks develop on the moulded flat elastomer surface. At first, cracks initiate at the location of the maximum tensile stress, yielding a crack growth angle of between 30o~50° with the elastomer surface. The angle being greater as the normal load applied on the blade is increased. The crack growth angle reduces as the crack increases in lengt
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11

Halley, William G. "Evaluating abrasive wear resistance of extruder tooling materials using the dry sand rubber wheel abrasion test." Thesis, Virginia Tech, 1990. http://hdl.handle.net/10919/42102.

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A series of experiments was performed on groups of samples made from materials currently used to manufacture tooling for extruders to determine if the ASTM G65 dry sand rubber wheel abrasion test could be used as an accelerated test to evaluate candidate materials. Samples were tested in the heat treated condition and after surface modification by plasma ion nitriding. The range of materials tested included medium and high alloy steels and steel bonded carbide composites. The abrasives used were AFS 50/70 test sand and Dresser Glasgrain crushed fused silica. <p>Evaluation of test wear scars an
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12

Barros, Celso de. ""Estudo da relação entre resistência à abrasão e dureza de ligas odontológicas de metais básicos para restauração metalocerâmica"." Universidade de São Paulo, 2002. http://www.teses.usp.br/teses/disponiveis/58/58131/tde-13112003-101112/.

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Embora haja grande exigência por restaurações estéticas livres de metal, restaurações metalocerâmicas, cujas subestruturas feitas com ligas de metais básicos, são procedimentos de rotina nos planejamentos restauradores protéticos. No entanto, a alta resistência ao desgaste destas ligas, caracterizada pela grande dificuldade de acabamento e polimento, tem sido associada à dureza, geralmente elevada. A proposta deste estudo foi avaliar resistência à abrasão e dureza de seis ligas de metais básicos (4 ligas de Ni-Cr, 1 liga de Co-Cr e 1 Ti comercialmente puro – 99,5% Ti) disponíveis comercialment
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13

Silveira, Camila Augusto [UNESP]. "Avaliação de uma nova abordagem cirúrgico-restauradora para tratamento de recessões gengivais associadas à lesão cervical não-cariosa: estudo clínico controlado randomizado." Universidade Estadual Paulista (UNESP), 2016. http://hdl.handle.net/11449/132941.

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14

Palanisamy, Karthikeyan. "Modeling of agglomerate abrasion in fluidized beds." Thesis, University of British Columbia, 2016. http://hdl.handle.net/2429/58970.

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Agglomeration occurs in fluidized beds in many industrial processes. It can be a desirable phenomenon, for instance in the pharmaceutical industries, or undesirable, as when it occurs in the Fluid Cokers used in bitumen processing. Excessive agglomerate growth can lead to a reduced efficiency of the process and ultimately to defluidization. Mathematical modeling can provide insights into agglomerate formation and breakage. Modeling the physics of agglomerate breakage is complicated since the breakage model needs to account for a number of processes occurring inside the fluidized bed. Breakage
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15

Rea, Brice R. "Plucking and abrasion beneath temperate plateau icefields." Thesis, Queen's University Belfast, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.239228.

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16

Goksoy, M. "A study of yarn-on-yarn abrasion." Thesis, University of Manchester, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.382649.

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17

Trezona, Robert Ian. "Abrasion and erosion of polymeric paint coatings." Thesis, University of Cambridge, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.621928.

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18

Thakare, Mandar Rajiv. "Abrasion-corrosion of downhole drill tool components." Thesis, University of Southampton, 2008. https://eprints.soton.ac.uk/64766/.

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The present work is a Schlumberger funded PhD project entitled ‘Abrasion-corrosion of downhole drill tool components’. The objective of this project was to replicate the wear-corrosion mechanisms of tungsten carbide (WC)-based hardmetals and coatings occurring in downhole environments (pH 9-11) under controlled laboratory conditions, to identify and establish a better understanding these mechanisms and the factors influencing them so as to minimise the material wastage during service. The presence of hard and soft phases within WC-based hardmetals and coatings results in complex wear mechanism
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19

Lundberg, Luke. "Saponin Removal from Quinoa by Abrasion Processing." DigitalCommons@CalPoly, 2019. https://digitalcommons.calpoly.edu/theses/2085.

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Quinoa is coated with a thin layer of saponins, glycosylated triterpenoids, that produce a bitter flavor when consumed. The average saponin content in commercial varietals from Bolivia average around 2.7% saponins and organoleptic testing shows the threshold for noticing a bitter flavor is below 0.12% (Medina-Meza et al., 2016). Current industrial processing methods use a combination of abrasion and turbulent water flow to remove saponin. This study will address the following research question: How will grain-to-grain and grain-to-surface abrasion affect the processing time to remove saponin f
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20

Mezlini, Salah. "Etude de l'usure par abrasion d'alliages d'aluminium." Ecully, Ecole centrale de Lyon, 2003. http://bibli.ec-lyon.fr/exl-doc/smezlini.pdf.

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Le transport de matériaux granulaires et leurs contacts avec des surfaces métalliques génèrent souvent les dégradations de ces dernières. Partant d'une analyse des dégradations en service, l'usure par abrasion a été mise en évidence. Un suivi des dégradations en services des alliages d'aluminium a montré que la corrélation entre dureté et résistance à l'usure n'est pas toujours vérifiée. Le résultat essentiel de cette étude est une analyse de la corrélation entre la résistance à l'usure par abrasion et les différents types de durcissement. Deux familles d'alliages d'aluminium sont étudiées, le
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21

Vassou, Vassoulla. "Abrasion resistance of fibre reinforced concrete floors." Thesis, Aston University, 2003. http://publications.aston.ac.uk/14147/.

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This thesis focuses on the investigation of the abrasion resistance of fibre reinforced concrete floors at both the macro and micro levels. A literature review of the available literature concerning subjects allied to the current project is included. This highlights themes relevant to wear mechanisms and the factors influencing it: factors that affect the abrasion resistance of concrete and several test methods for assessing it; and the historical development of fibres and the properties of different fibre types and their influence on concrete. Three accelerated abrasion testers were compared
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22

Mezlini, Salah Kapsa Philippe. "Etude de l'usure par abrasion d'alliages d'aluminium." (S.l.) : (s.n.), 2003. http://bibli.ec-lyon.fr/exl-doc/smezlini.pdf.

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23

Voronets, Julia. "Controlled toothbrush abrasion of softened human enamels /." [S.l.] : [s.n.], 2008. http://opac.nebis.ch/cgi-bin/showAbstract.pl?sys=000279103.

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24

Lakew, Wondwosen Ayelework. "Finite element based simulation of abrasion trauma." Thesis, IIT Delhi, 2018. http://eprint.iitd.ac.in:80//handle/2074/8036.

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25

Goossens, François. "Modélisation du processus de polissage : identification des effets et des phénoménologies induits par l'usinage abrasif." Thesis, Bordeaux, 2015. http://www.theses.fr/2015BORD0335/document.

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Le polissage est un procédé d’usinage par abrasion qui vise à établir une micro-géométrieprécise sur les surfaces de solides. Pour introduire les spécificités de ce procédé, un tourd’horizon sur l’usinage par abrasion est proposé. Il en découle les paramètres pouvantcaractériser une opération de polissage. Les études scientifiques existantes sont synthétisées etanalysés au regard des objectifs poursuivis. De manière à faire émerger une méthodologiepour établir des modèles et des bases de données dédiées au polissage, un banc expérimental aété mis en place et des essais ont été menés sur une tô
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26

OLIVEIRA, Marcelo dos Anjos. "Desgaste abrasivo do aço Hadfield com diferentes teores de carbono em abrasômetro do tipo pino-disco." Universidade Federal de Pernambuco, 2016. https://repositorio.ufpe.br/handle/123456789/18671.

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Submitted by Fabio Sobreira Campos da Costa (fabio.sobreira@ufpe.br) on 2017-04-27T15:18:52Z No. of bitstreams: 2 license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) Marcelo Oliveira.pdf: 7846435 bytes, checksum: 4659cf7d50095ccabdf49ebcc00f0bba (MD5)<br>Made available in DSpace on 2017-04-27T15:18:52Z (GMT). No. of bitstreams: 2 license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) Marcelo Oliveira.pdf: 7846435 bytes, checksum: 4659cf7d50095ccabdf49ebcc00f0bba (MD5) Previous issue date: 2016-08-31<br>A presente pesquisa teve como objetivo, inv
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Petrov, Adrien. "Modélisation mathématique de procédés d'usinage: abrasion et mouillage." Phd thesis, Université Claude Bernard - Lyon I, 2002. http://tel.archives-ouvertes.fr/tel-00005277.

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Ce travail de thèse est consacré à l'étude d'un modèle viscoélastique avec des contraintes unilatérales, modélisé comme un matériau de Kelvin-Voigt. Le chapitre un est consacré au cas monodimensionnel: on approche la solution du problème par pénalisation, ce qui conduit à un théorème d'existence d'une solution faible. Un résultat de régularité des traces permet de montrer que la solution est forte. Le chapitre deux comporte un schéma numérique dont on montre la convergence vers une solution faible. Les chapitres trois et quatre permettent de construire une solution forte dans un milieu monodim
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28

Wilson, Andrew. "Fluvial bedrock abrasion by bedload : process and form." Thesis, University of Cambridge, 2009. https://www.repository.cam.ac.uk/handle/1810/265496.

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Bedrock channels are a key component of the landscape. Pluvial bedrock incision sets the local base level, the boundary condition for hill slope processes, transmits tectonic and climatic signals throughout the landscape and transports sediments to sedimentary basins. Bedrock river networks are also responsible for the texture and relief of an unglaciated landscape, and in flexural landscapes bedrock channels significantly effect rates and patterns of erosional unloading and consequently long-term sediment fluxes to basins. This thesis investigates the mechanism and morphological expression of
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29

Lafleur, Jean-Philippe. "A study of abrasion in steel during comminution." Thesis, McGill University, 2011. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=103656.

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Comminution is a process used in mineral processing for the size reduction of mined material, to permit effective handling, separation and recovery. The equipment used is kinetically complex, with very high-energy impacts and high forces, leading to great amounts of abrasive wear. It is desired to develop a better understanding of these processes, to both measure them and increase comminution while reducing wear. The Steel Wheel Abrasion Test is a laboratory technique used to generate controlled, abrasive three-body wear. By altering the applied force, rotational speed of the wheel and abrasiv
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30

Brown, I. F. "Abrasion and friction in parallel-lay rope terminations." Thesis, University of Cambridge, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.596954.

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Ropes made from parallel aramid yarns have been used for many years due to their light weight, good electrical properties and utilisation of the material's stiffness. The standard termination for these parallel-lay ropes is a "spike-and-barrel" developed by the rope manufacturer. The terminations perform very well under static loading but fail due to abrasion of the rope near the nose of the spike when exposed to cyclic stresses. Spike-and-barrel terminations for parallel-lay ropes are much more complex than they first appear. The functioning of the termination is heavily influenced by geometr
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31

Halim, Mahdi Hassan. "Truck tyre tread rubber : compounding and abrasion resistance." Thesis, Loughborough University, 1990. https://dspace.lboro.ac.uk/2134/6743.

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32

Alshabbani, Haydar Swiry Rahi. "Metal matrix composites with diamond for abrasion resistance." Thesis, University of Sheffield, 2018. http://etheses.whiterose.ac.uk/22944/.

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Metal matrix composites (MMCs) have been used in many applications (such as automotive, aerospace and construction) for many decades. Recently, there have been interesting developments in this type of composite, applying them in electronic and thermal applications such as with semiconductors, in electronic packaging and heat sinks. This is particularly the case for composites of a metal matrix with diamond which are considered a modern sub-class of metal matrix composites. However, while the thermal properties are exceptional, this class of composites has not been extensively examined for mech
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33

Kent, Anthony Clifford. "The mechanics of abrasion relating to household cleaning." Thesis, University of Birmingham, 2016. http://etheses.bham.ac.uk//id/eprint/6954/.

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Abrasion of polymer surface films or coatings in an everyday occurrence, whether in the home, work or industry. As a result a wide variety of polymer films can be found on surfaces. Despite the numerous applications, three body thin film abrasion appears a niche area of study and as a result under-researched. This investigation focuses on identifying, characterising and quantifying the abrasive wear of a baked dehydrated castor oil deposit formed on stainless steel. The primary aim of this project is to understand how the fundamental properties of the liquid abrasive cleaning system contribute
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Rutherford, Keith Leslie. "New methods for characterising abrasion and erosion resistance." Thesis, University of Cambridge, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.627429.

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35

Fasahat, F., R. Dastjerdi, and M. R. M. Dastjerdi. "Abrasion Resistance of Ag/SiO2/PA6 Nanocomposite Fabrics." Thesis, Sumy State University, 2013. http://essuir.sumdu.edu.ua/handle/123456789/35638.

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In recent decades, polymeric nanocomposites have been widely used in chemical, automobile and aero industries due to their low weight and smoothness. Abrasion resistance is a vital property in variable ap-plications of polymeric composites. Here, to investigate the wear resistance of nylon 6 nanocomposite fab-rics, melt spun yarns were filled with different concentrations of Ag/SiO2 nanoparticles and the wear prop-erties of weft knitted nanocomposite and pure samples were evaluated. Results disclosed that the wear re-sistance of composite fabrics containing nano-particles increased considerabl
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CAUBET, CHRISTOPHE. "Abrasion dentaire physiologique et pathologique : etude dans une usine d'abrasifs." Toulouse 3, 1989. http://www.theses.fr/1989TOU31204.

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37

Goeldel, Benoit. "Étude et mise en œuvre d'un moyen flexible pour le rodage de carter cylindre de moteur à combustion interne." Phd thesis, Paris, ENSAM, 2013. http://pastel.archives-ouvertes.fr/pastel-00910324.

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Le procédé de rodage par pierres abrasives est actuellement utilisé pour produire en grande série des chemises de carter cylindre avec des propriétés fonctionnelles spécifiques. La qualité de forme, la rugosité et l'aspect des surfaces ainsi rodées déterminent grandement les performances mécaniques et écologiques des moteurs. Le processus de rodage, mécaniquement complexe, fait intervenir des machines complètement dédiées et optimisées pour les rodages classiques. Après une étude détaillée des machines de production actuelles, de leurs performances et de leurs limites, l'objectif de recherche
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Teixeira, Symone Cristina [UNESP]. "Avaliação da microinfiltração marginal em restaurações de classe V em resina composta em dentes bovinos: efeito de diferentes equipamentos para preparos cavitários e sistemas adesivos." Universidade Estadual Paulista (UNESP), 2000. http://hdl.handle.net/11449/114070.

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Made available in DSpace on 2015-01-26T13:21:31Z (GMT). No. of bitstreams: 0 Previous issue date: 2000-03-06Bitstream added on 2015-01-26T13:30:17Z : No. of bitstreams: 1 000134871.pdf: 7061870 bytes, checksum: 73e133b2649ba2fd2f69348825cc9651 (MD5)<br>O objetivo desse trabalho foi avaliar in vitro a microinfiltração marginal de cavidades de classe V preparadas com turbina de alta rotação (AR), jato abrasivo (AB), ultra-som (US) e laser de Er:YAG (LA) e restauradas com um sistema adesivo multi-passos e um auto-condicionante. Foram selecionados 160 incisivos bovinos para prepare das cavidades
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Muzilli, Marcelo 1972. "Efeito de metodos de polimento na rugosidade e dureza Vickers de ceramicas para cobertura." [s.n.], 2009. http://repositorio.unicamp.br/jspui/handle/REPOSIP/289567.

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Orientador: Lourenço Correr Sobrinho<br>Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba<br>Made available in DSpace on 2018-08-13T01:39:57Z (GMT). No. of bitstreams: 1 Muzilli_Marcelo_D.pdf: 34149055 bytes, checksum: 91212ba7ea6406d835e270899c5d9256 (MD5) Previous issue date: 2009<br>Resumo: O objetivo deste estudo foi avaliar o efeito do método de polimento na rugosidade e na dureza Vickers de doze cerâmicas utilizadas para cobertura, após serem submetidas ao desgaste abrasivo. Foram confeccionados quarenta discos de cada cerâmica, cor de esmalte
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Italiani, Flávia de Moraes. "Efeito do íon ferro na prevenção da erosão dentária: estudos in vitro e in situ." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/25/25142/tde-18082010-103048/.

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Este projeto teve como objetivos investigar o efeito do íon ferro (Fe+2), associado ou não ao íon flúor (F-), na redução da erosão do esmalte e da dentina bovinos, bem como desenvolver e avaliar um dentifrício enriquecido com Fe+2 para a prevenção da erosão associada à abrasão. Foram realizados 4 subprojetos: (1) Determinação do efeito protetor de concentrações crescentes do Fe+2 (0 a 120 mmol/L) associadas ou não ao F- (0 a 4 g/mL), contra a dissolução do pó de esmalte bovino in vitro; (2) Avaliação, in vitro, do efeito protetor do Fe+2 a 10 mmol/L contra a dissolução mineral da superfície do
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41

Martins, Samira Branco. "Influência do tamanho da partícula, do jateamento prévio à sinterização e do envelhecimento na resistência mecânica de uma zircônia estabilizada por ítria." Universidade Estadual Paulista (UNESP), 2018. http://hdl.handle.net/11449/155943.

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Submitted by Samira Branco Martins (samirabmartins@foar.unesp.br) on 2018-08-30T19:44:38Z No. of bitstreams: 1 TESE DOUTORADO SAMIRA .pdf: 933881 bytes, checksum: 1ebe4097c1b2d6665a4be82cc94f2dfa (MD5)<br>Rejected by Marley Cristina Chiusoli Montagnoli (marley@foar.unesp.br), reason: Por favor, fazer as seguintes correções: - inserir a ficha catalográfica no arquivo de sua tese; - quando for preencher metadados, preencher o campo Agência de fomento. on 2018-09-04T12:52:59Z (GMT)<br>Submitted by Samira Branco Martins (samirabmartins@foar.unesp.br) on 2018-09-06T18:29:33Z No. of bitstreams:
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42

Aslantas, Onur. "A Study On Abrasion Resistance Of Concrete Paving Blocks." Master's thesis, METU, 2004. http://etd.lib.metu.edu.tr/upload/12605709/index.pdf.

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Concrete block pavement (CBP) can be an alternative pavement to asphalt and concrete pavements. CBP is formed from individual concrete paving blocks (CPBs) that fit next to one another on a suitable sub base leaving a specific joint space among them to be filled with jointing sand. CBP differ from other pavements according to their mechanical behavior, manufacturing technique, structural design, installation technique and structural behavior. For a serviceable pavement all of these subjects have to be studied. The literature about the mechanical behavior of CPBs is not adequate. This study a
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43

Jones, Jeremy. "Abrasion Characteristics of Ring-Spun and Open-End Yarns." NCSU, 2001. http://www.lib.ncsu.edu/theses/available/etd-20011115-182006.

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<p> Jones, Jeremy. Abrasion Characteristics of Ring-Spun and Open-End Yarns. (Under the direction of Dr. Pam Banks-Lee and Dr. William Oxenham.) In the early 1980s, widespread claims in the knitting industry suggesting that the use of open-end yarns significantly increased the wear of mechanical components, especially knitting needles. Since then, many studies have attempted to explain this phenomenon and have yielded widely varying results. A study was conducted to compare the yarn properties of open-end yarn to ring-spun yarn. Identical yarns of varying parameters including yarn type, yarn c
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44

Scholl, Milton R. "Development of intermetallic-hardened abrasion-resistant weld hardfacing alloys /." Full text open access at:, 1986. http://content.ohsu.edu/u?/etd,95.

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45

Molloy, Padraig. "Plastic and brittle mechanisms in single-point glass abrasion." Thesis, Imperial College London, 1990. http://hdl.handle.net/10044/1/46454.

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Elwell, David W. J. "Toughness and abrasion resistance of high alloy cast iron." Thesis, Aston University, 1986. http://publications.aston.ac.uk/11866/.

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47

Redmalm, Göran. "Dentifrice abrasivity." Stockholm : Kongl Carolinska Medico Chirurgiska Institutet, 1987. http://catalog.hathitrust.org/api/volumes/oclc/15730783.html.

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Chan, Kit-ping Cordelia, and 陳潔萍. "Comparing the effectiveness of a new innovative desensitizing paste to a home-used desensitizing toothpaste in reducing dentine hypersensitivity among Chinese adults." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2014. http://hdl.handle.net/10722/206444.

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This study aimed to compare the effectiveness of an 8% arginine and calcium carbonate in-office desensitizing prophylaxis paste with that of a home-use toothpaste having the same active ingredients in reducing dentine hypersensitivity. The study was a randomized controlled clinical trial involving 55 subjects who had at least one tooth with sound exposed dentine on the cervical region of the buccal surface displaying hypersensitivity. The subjects were recruited from students and staff, other than those from the Faculty of Dentistry, of The University of Hong Kong. After receiving scaling perf
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Euzenat, Charly. "Contributions à la simulation de l’enlèvement de matière par abrasion." Thesis, université Paris-Saclay, 2020. http://www.theses.fr/2020UPAST059.

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La réalisation des pièces mécaniques à forte valeur ajoutée implique des temps d'usinage conséquents et nécessite parfois une finition des surfaces fonctionnelles par abrasion pour atteindre les spécifications requises. La bonne définition des paramètres de la gamme de fabrication joue un rôle important dans l'obtention l'état de surface final sur les pièces produites. Dans ce contexte, la maîtrise des exigences est encore réalisée de manière empirique.La thèse sur le polissage des surfaces fonctionnelles et plus particulièrement sur la prédiction et la simulation réaliste des effets des procé
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Leiria, Paulo Ari Tietböhl. "Avaliação cirúrgica e laboratorial da utilização de pericárdio homólogo em lesões por abrasão em serosa de cólon maior (flexura pélvica) de equinos." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/10/10137/tde-28022012-091900/.

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As aderências intra-abdominais são complicações relativamente comuns das cirurgias abdominais dos equinos após uma intervenção cirúrgica, podendo resultar em processos obstrutivos, dor abdominal recorrente e vôlvulos. Os avanços técnicos e farmacológicos são direcionados a minimizar o trauma e a inflamação peritoneal, aumentar o processo de fibrinólise, promover movimentação intestinal e separar tecidos potencialmente adesiogênicos durante a fase inicial de cicatrização. No presente trabalho foram utilizados 10 equinos, machos, SRD, entre 4 e 15 anos e peso entre 300 e 400kg. Incluíram-se no e
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